| Acronym | Definition |
|---|
| GDT | Getting Things Done |
| GDT | Goal Directed Therapy |
| GDT | Grand Dictionnaire Terminologique (French: Great Terminology Dictionary) |
| GDT | Graphic Design Technology (educational course) |
| GDT | Gesellschaft Deutscher Tierfotografen (German: Society of German Nature Photographers) |
| GDT | Ground Data Terminal |
| GDT | Global Descriptor Table |
| GDT | Goodwin Development Trust (UK) |
| GDT | Graphic Display Terminal |
| GDT | Glass Direct Texture |
| GDT | Gas Discharge Tube (energy, electrotechinical and electronics) |
| GDT | Geographic Data Technology Inc. |
| GDT | Ground Defence Training (UK military) |
| GDT | Group Delay Time |
| GDT | General Department of Taxation (Vietnam) |
| GDT | Geometric Dimensioning & Tolerancing |
| GDT | Geographically Dispersed Team |
| GDT | Game Day Thread (forums) |
| GDT | Geophysical Diffraction Tomography |
| GDT | Global Dairy Trade |
| GDT | Geräte-Daten-Transfer (German: Device Data Transfer) |
| GDT | General Delivery Terms (shipping) |
| GDT | General Discussion Thread |
| GDT | Gate Drive Transformer |
| GDT | Game Developers Toolkit |
| GDT | Genetic Decision Tree |
| GDT | Great Deku Tree (gaming, The Legend of Zelda) |
| GDT | Gracies Dinnertime Theatre |
| GDT | General Daily Thread (Weight Watchers forum) |
| GDT | Guidant, Inc (stock symbol) |
| GDT | Greenwich Daylight Savings Time |
| GDT | Gas Decay Tank |
| GDT | Georgia Drill Team |
| GDT | GeoDict (file format) |
| GDT | Grand Turk Islands, Turks and Caicos Islands (airport code) |